KR920702126A - How to equalize signal by test sequence - Google Patents

How to equalize signal by test sequence

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Publication number
KR920702126A
KR920702126A KR1019910701784A KR910701784A KR920702126A KR 920702126 A KR920702126 A KR 920702126A KR 1019910701784 A KR1019910701784 A KR 1019910701784A KR 910701784 A KR910701784 A KR 910701784A KR 920702126 A KR920702126 A KR 920702126A
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South Korea
Prior art keywords
sequences
sequence
correlation
data flow
test
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KR1019910701784A
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Korean (ko)
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KR0163057B1 (en
Inventor
오토 클랑크
위르겐 라압스
Original Assignee
로베르트 아인젤
도이체 톰손-브란트 게엠베하
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Publication of KR920702126A publication Critical patent/KR920702126A/en
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Publication of KR0163057B1 publication Critical patent/KR0163057B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
    • H04L25/03146—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a recursive structure

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Optical Communication System (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Noise Elimination (AREA)
  • Dc Digital Transmission (AREA)
  • Networks Using Active Elements (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

PCT No. PCT/EP90/00873 Sec. 371 Date Jan. 27, 1992 Sec. 102(e) Date Jan. 27, 1992 PCT Filed Jun. 1, 1990 PCT Pub. No. WO90/15495 PCT Pub. Date Dec. 13, 1990.In order to equalize digitally coded signals, predetermined test sequences are transmitted before useful data is transmitted. The test sequences are correlated with an identical test sequence stored in the receiver and the result of the correlation, in the form of a channel pulse response correlation spectrum, is used to control filter coefficients of a receiver filter arrangement to simulate an inverse transfer function of the transmission channel.

Description

테스트 시켄스에 의해 신호를 등화시키는 방법How to equalize signal by test sequence

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 수신측에서 등화되는 다중통로 전송모델을 나타낸 도면이며, 제2도는 유효데이타 및 테스트-시켄스가 전송되는 데이타 프레임의 구조를 나타낸 도면이고, 제3도는 주기적 상관을 표시하는 데이타 흐름의 일부를 나타낸 도면.FIG. 1 is a diagram illustrating a multi-path transmission model equalized at a receiving side, and FIG. 2 is a diagram showing a structure of a data frame in which valid data and test-sequences are transmitted. FIG. 3 is a part of a data flow indicating periodic correlation. The figure showing.

Claims (6)

다중통로 수신의 경우 전송채널을 경유하여 전송되는, 디지탈 방식으로 부호화된 신호용 수신기에서 신호를 등화시키기 위한 방법에 있어서, 유효 데이타의 전송전에 통상 구조의 테스트 시켄스가 전송되며, 수신된 테스트 시켄스는 통상구조의 수신기에 기억된 테스트 시켄스와 상관되고, 상관 스펙트럼의 형태인 상관의 결과로서 받아들어진 채널 임팩트 응답은 전송채널의 전송기능을 반대로 시뮬레이트하는 필터장치의 계수를 제어하기 위해 사용되는 것을 특징으로 하는 테스트-시켄스에 의해 신호를 등화시키는 방법.A method for equalizing a signal in a digitally encoded signal receiver, which is transmitted via a transmission channel in the case of multipath reception, wherein a test sequence of a conventional structure is transmitted before transmission of valid data, and the received test sequence is normally The channel impact response correlated with the test sequence stored in the receiver of the structure and received as a result of correlation in the form of a correlation spectrum is used to control the coefficients of the filter device that simulates the transmission function of the transmission channel in reverse. Equalizing the signal by a test-sequence. 제1항에 있어서, 테스트 시켄스로서 각각의 경우에 2개의 동일한 M-시켄스가 직접 연달아 전송되고, 기억된 M-시켄스의 환형 상관은 유효 데이타와 M-시켄스로 이루어지며 다중 통로수신의 경우 시간적으로 중첩된 데이타 흐름의 어느 하나의 부분에 의해 실시되며, 이경우 이 부분은 수신기에 가장 먼저 도착하는 제2의 M-시켄스를 통해 제공되고, 이어서 기억된 M-시켄스는 데이타 흐름의 일부와바이트 단위로 곱해지며, 계산의 결과가 가산되고, 이 부분의 이동후 이 부분의 모든 바이트는 기억된 M-시켄스의 모든 바이트와 곱해질 때까지 기억된 M-시켄스에 비해 하나의 바이트만큼 곱셉 단계 및 가산 단계가 반복되며 얻어진 가산의 결과로부터 M-시켄스와 동일한 길이의 합계는 상관 스펙트럼으로서 발생되는 것을 특징으로 하는 방법.The method according to claim 1, wherein in each case two identical M-sequences are directly sent in succession as test sequences, and the annular correlation of the memorized M-sequences consists of valid data and M-sequences and in time for multipath reception. Implemented by either part of the nested data flow, in which case this part is provided via a second M-sequence that arrives first at the receiver, and the stored M-sequence is then measured in parts and bytes of the data flow. Are multiplied, and the result of the calculation is added, and after the movement of this part, all bytes of this part are multiplied by one byte compared to the stored M-sequence by one byte compared to the stored M-sequences. Wherein the sum of lengths equal to M-sequences from the result of the repeated addition obtained is generated as a correlation spectrum. 제2항에 있어서, 상기 부분을 검출하기 위해 M-시켄스 및 유효 데이타로부터 형성된 데이타 흐름은 M-시켄스의 길이이상으로 기억된 M-시켄스와 상관되며, M-시켄스의 길이의 데이타 흐름의 일부는 기억된 M-시켄스와 바이트 단위로 곱해지며, 곱셉의 결과가 가산되고, 하나의 바이트만큼 이동된 부분이 데이타 흐름으로부터 선택되며, 이 부분 및 그 다음 부분에 대한 곱셈단계 및 가산단계가 수행되고, 상관값은 하나의 M-시켄스만큼 지연된 상관값과 곱해지며, 발생된 적은 M-시켄스의 길이상에 가산되고, 그와같이 발생된 계속적인 합계 함수로 부터 최대값이 평가되며, 합계 함수의 최대값에 따른 데이타 흐름의 경사진 에지앞의 부분이 환형의 상관에 대한 부분으로서 M-시켄스의 길이와 같은 길이로 선택되는 것을 특징으로 하는 방법.3. The data flow of claim 2 wherein the data flow formed from the M-sequences and valid data to detect the portion is correlated with the M-sequences stored beyond the length of the M-sequences, wherein a portion of the data flows of the lengths of the M-sequences are The M-sequence is multiplied by the byte unit, the result of the multiplication is added, the portion shifted by one byte is selected from the data flow, and the multiplication and addition steps for this portion and the next portion are performed, The correlation value is multiplied by the correlation value delayed by one M-sequence, the small number generated is added over the length of the M-sequences, the maximum value is evaluated from the continuous sum function thus generated, and the maximum of the sum function. Wherein the portion in front of the sloped edge of the data flow according to the value is chosen to be the same length as the length of the M-sequence as part of the annular correlation. 제1 내지 3항중 어느 한 항 또는 다수의 항에 있어서, 테스트 시켄스의 주기는 전송채널의 지연시간의 가장 큰 차보다 더 크게 선택되는 것을 특징으로 하는 방법.4. A method according to any one of the preceding claims, wherein the period of test sequence is chosen to be greater than the largest difference of the delay time of the transmission channel. 제1 내지 4항중 어느 한 항 또는 다수의 항에 있어서, 다단계의 전송방법, 예를들면 4PSK전송의 경우 테스트 시켄스가 하나의 채널에서만 전송되는 반면, 다른 채널에서 동일한 시간 구간에서 동일한 값, 예를들면 0들 또는 1들만이 전송되고, 2개 채널에서의 상관이 수행되는 것을 특징으로 하는 방법.The method according to any one of claims 1 to 4, wherein the test sequence is transmitted only in one channel in case of multi-stage transmission method, for example, 4PSK transmission, while the same value is used in the same time interval in another channel. For example only zeros or ones are transmitted and the correlation on the two channels is performed. 제5항에 있어서, 합계 함수들은 시간적으로 일치하는 상관값들의 조합된 평가를 통해 2개의 채널로부터 형성되는 것을 특징으로 하는 방법.6. The method of claim 5, wherein the sum functions are formed from two channels through combined evaluation of temporally coincident correlation values. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910701784A 1989-06-06 1990-06-01 Signal equalizing method employing test sequences KR0163057B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DEP3918340.8 1989-06-06
DE3918340A DE3918340A1 (en) 1989-06-06 1989-06-06 PROCEDURE FOR SIGNAL EQUALIZATION
DEP39183408 1989-06-06

Publications (2)

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KR920702126A true KR920702126A (en) 1992-08-12
KR0163057B1 KR0163057B1 (en) 1998-12-01

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US (1) US5274669A (en)
EP (1) EP0475984B1 (en)
JP (1) JP3233926B2 (en)
KR (1) KR0163057B1 (en)
AT (1) ATE114097T1 (en)
AU (1) AU5745190A (en)
DE (2) DE3918340A1 (en)
HK (1) HK13296A (en)
WO (1) WO1990015495A1 (en)

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Also Published As

Publication number Publication date
AU5745190A (en) 1991-01-07
DE3918340A1 (en) 1990-12-13
JPH04505690A (en) 1992-10-01
US5274669A (en) 1993-12-28
HK13296A (en) 1996-02-02
WO1990015495A1 (en) 1990-12-13
EP0475984B1 (en) 1994-11-09
DE59007703D1 (en) 1994-12-15
EP0475984A1 (en) 1992-03-25
JP3233926B2 (en) 2001-12-04
KR0163057B1 (en) 1998-12-01
ATE114097T1 (en) 1994-11-15

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